Horrible hack to intercept Web3js requests in node. Probably extremely fragile.

Web3RequestLogger.js

function Web3RequestLogger(httpProvider) {
    let handler = {
        get(target, propKey, receiver) {
            const origMethod = Reflect.get(target, propKey, receiver);
            if (propKey === "send") {
                return function (...args) {
                    console.log(`Sent JSONRPC Request: ${JSON.stringify(args[0])}`);
                    let responseCallback = function(err, result) {
                        console.log(`Received JSONRPC Response: ${JSON.stringify(result)}`)
                        args[1](err, result)
                    };
                    return origMethod.apply(this, [args[0], responseCallback]);
                };
            }
            return origMethod;
        }
    };
    return new Proxy(httpProvider, handler);
}

Similar functionality can be achieved using web3-provider-engine, however I think it only supports HTTP rather than websockets.

  const engine = new RpcEngine();
    engine.push(function (req, res, next, end) {
        next(function(cb) {
            console.log(req);
            console.log(res);
            cb();
        });
    });
    engine.push(createInfuraMiddleware({ network: 'mainnet', projectId: '<id>' }));